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Question

How many moles are 9.033×1024 atoms of helium?


A

13

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B

15

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C

22

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D

16

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Solution

The correct option is B

15


Helium can exist as a single atom due to its fully filled outermost shell(K shell).
6.022×1023 atoms of helium= 1 mole

9.033×1024 atoms of helium = 9.033×10246.022×1023
= 15moles.


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